I've found this: http://projectzomboid.com/modding/se/krka/kahlua/integration/expose/LuaJavaClassExposer.html on exposing java classes to lua, but I know the class I want to use is already exposed (IsoPlayer). Could anyone tell me if it is possible to modify/override a public boolean or float in that class? Something like whenever public float x is called my own lua code runs and returns the needed changes. I've been able to learn a lot from this forum and existing mods out there but I couldn't find anything on this, and I'd rather avoid changing class files if I can.